The new Macbook Pro replaces the wife's 2009 13" Macbook Pro. My experience with it is similar to Joel's and Neuro's. It still handled the 5Ds R ,albeit slowly, and I would have stuck with it except the hard drive is just too small.
Lumens, I believe you are right it does matter who makes the machine. The laptop I have from ASUS is an ROG and built for gaming, it has a quality video card and I think that helps. It was a pain working with 10 at first but once I figured out how to get back to a more conventional desktop screen I have to say I have had not problems.
Kayaker, when you buy your new 5D IV or 5Ds R you will regret getting a surface pro with just 256gb.
Two of the problems with the new Mac that were bugging me last night:
Occasionally when reviewing files in Adobe Bridge, the delete button would just completely stop working. I would have to shut the program and restart.
If I open Google Earth and minimize the pointer will not recognize the icon on the taskbar and will not open it.
I may take it back to the apple store and see if they can reload the operating system.